燃烧法制备掺杂Y改性LaMgB_5O_(10)粉体及表征

Preparation and Characterization of Yttrium Doping Modified LaMgB_5O_(10) Powder by Combustion Method

以水合硝酸镧(La(NO_3)3·nH_2O)、六水硝酸镁(Mg(NO_3)2·6H_2O)为氧化剂,甘氨酸(C_2H_5NO_2)为还原剂,掺杂氧化钇(Y_2O_3)粉体,通过燃烧法合成掺杂Y改性的硼酸镁镧(LaMgB_5O_(10))粉体。研究了Y的掺杂量、焙烧温度和时间等工艺参数对合成Y改性LaMgB_5O_(10)的影响。通过X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、荧光光谱(PL)、紫外-可见漫反射光谱(UV-Vis DRS)等手段对产物进行表征。结果表明,当Y的掺杂量为5%,焙烧温度900℃,焙烧时间5 h时,Y改性LaMgB_5O_(10)效果最佳。Y改性LaMgB_5O_(10)在212~317 nm处出现了很强的紫外吸收峰;在280~355 nm和368~435 nm处有很强的发射宽峰。

Yttrium doping modified LaMgB5O10 powder was synthetised with lanthanum nitrate hydrate （La（ NO3 ）3 nH2O）, yttrium oxide （Y2O3） as oxidant and magnesium nitrate hexahydrate （Mg （NO3）2 6H2O） as reductant by combustion method. The effects of Y doping amount, calcination temperatures and time on the synthesis of Y modified LaMgB5O10 were studied. The products were analyzed by X-ray powder diffraction （XRD）, scanning electron microscopy （SEM）, photoluminescence spectroscopy （PL） and ultraviolet-visible diffuse reflectance spectroscopy （UV-Vis DRS）. The results show that Y modified LaMgB5O10 has the best effect when the doping amount of Y is 5% , the calcination temperature is 900 ℃ and the calcination time is 5 h. Y modified LaMgB5O10 appear strong ultraviolet absorption peak at 212-317 nm and strong emission peaks at 280-355 nm and 368-435 nm.